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4 years ago

QUESTION: A phenomenon can best be described as a .

2 answers:

7 0

Something that’s strange or doesn’t happen often
in a sentence “ in all his travels he studied only the phenomena of nature and life

Paladinen [302]4 years ago

5 0

Circumstance observed or occurrence

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What is the total number of protons in the nucleus of calcium -42?

amm1812

Since the atomic number of calcium is 20. The number of protons is also 20.

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3 years ago

In this part of the periodic table, what type of elements are in the group that includes elements c, o, and s?

wolverine [178]

Metalsnonmetalssemimetals

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3 years ago

Excess aqueous copper(II) nitrate reacts with aqueous sodium sulfide to produce aqueous sodium nitrate and copper(II) sulfide as

nikitadnepr [17]

The question in incomplete, complete question is;

Determine the theoretical yield:

Excess aqueous copper(II) nitrate reacts with aqueous sodium sulfide to produce aqueous sodium nitrate and copper(II) sulfide as a precipitate. In this reaction 469 grams of copper(II) nitrate were combined with 156 grams of sodium sulfide to produce 272 grams of sodium nitrate.

Answer:

The theoretical yield of sodium nitrate is 340 grams.

Explanation:

$Cu(NO_3)_2(aq)+Na_2S(aq)\rightarrow 2NaNO_3(aq)+CuS(s)$

Moles of copper(II) nitrate = $\frac{469 g}{187.5 g/mol}=2.5013 mol$

Moles of sodium sulfide = $\frac{156 g}{78 g/mol}=2 mol$

According to reaction, 1 mole of copper (II) nitrate reacts with 1 mole of sodium sulfide.

Then 2 moles of sodium sulfide will react with:

$\frac{1}{1}\times 2mol= 2 mol$ of copper (II) nitrate

As we can see from this sodium sulfide is present in limiting amount, so the amount of sodium nitrate will depend upon moles of sodium sulfide.

According to reaction, 1 mole of sodium sulfide gives 2 mole of sodium nitrate, then 2 mole of sodium sulfide will give:

$\frac{2}{1}\times 2mol=4 mol$ sodium nitrate

Mass of 4 moles of sodium nitrate :

85 g/mol × 4 mol = 340 g

Theoretical yield of sodium nitrate = 340 g

The theoretical yield of sodium nitrate is 340 grams.

7 0

3 years ago

Read 2 more answers

What does FE stand for in the Periodic Table of Elements?

sveticcg [70]

It stabds for Iron.

6 0

3 years ago

Read 2 more answers

Dsm-5 includes gambling disorder as an addictive disorder, along with substance use disorders. this change is considered importa

Airida [17]

Dsm-5 includes gambling disorder as an addictive disorder, along with substance use disorders. This change is considered important because it suggest that people may become addicted to behavior net just substance.

<h3>What is Gambling ? </h3>

Gambling disorder which involve repeated, problem gambling behavior. The behavior leads to problem for the individual families, and society.

The emotional and physical sign of gambling disorder are:

Anxiousness and Depression
Hopelessness
Lack of sleep
Pallor to skin
Gain loss of weight

<h3>What are the effects of gambling disorder ?</h3>

Gambling disorder make another kind of addiction that an individual uses to be able to deal with the situation. Start using the drugs alcohol to reduce the feeling of anxiety.

Thus from the above conclusion we can say that Dsm-5 includes gambling disorder as an addictive disorder, along with substance use disorders. This change is considered important because it suggest that people may become addicted to behavior net just substance.

Learn more about the Gambling Disorder here: brainly.com/question/28026101

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1 year ago

QUESTION: A phenomenon can best be described as a ________________________ ________________________.

QUESTION: A phenomenon can best be described as a .